British transport officials have acknowledged there will be some rail delays and disruptions during the Olympics after two rail links failed as organisers held a rehearsal for the opening ceremony.

Peter Hendy, London’s transport chief, said last week “it will get busy” and “we will get some queues”.

London is bracing to handle one million visitors and up to three million more journeys a day on public transport during the Games, from July 27 to August 12.

On Monday night, two lines near the Olympic Park stopped working temporarily as thousands of volunteers practiced their opening ceremony roles.

Britain’s Transport Secretary, Justine Greening, says even “on a transport system as complex as London’s, things do go wrong”. – Sapa-AP